ios: improve kit generation

* remove all unknown autodetected iphone* kits
* update more thoughly existing kits

Change-Id: Ia71328a3f88eaede28f9199f1c301f23a88ad58b
Reviewed-by: Caroline Chao <caroline.chao@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>